Republik Indonesia, 1948 Essay Banknote Specimen. Indonesia. September 1, 1948, 50 Rupiah, P-Unlisted50a, Essay specimen uniface front and back banknotes. Block 1-A. Specimen overprints and POC's. Front is purple, back is dark blue. Back of note has farmer plowing with oxen. Choice to Gem Uncirculated, Rare essay note. SBNC. Republik Indonesia, 1948 Essay Banknote Specimen. Indonesia. September 1, 1948, 50 Rupiah, P-Unlisted50a, Essay specimen uniface front and back banknotes. Block 1-A. Specimen overprints and POC's. Front is purple, back is dark blue. Back of note has farmer plowing with oxen. Choice to Gem Uncirculated, Rare essay note. SBNC.